I would rate the top 3 China Town dim sums in the following order:
1) Hei La Moon
2) Chau Chau City
3) China Pearl
I have alot of photos and stuff on my blog site
Both Chau Chau and China Pearl have the fixed station mentioned above. Typically they have tripe, clams, muscles sometimes, greens, snails, noodles. Hei La moon has those items too but carries them around.